Who should i replace for jetragon?

this is my first ever palworld playthrough and i’ve really been enjoying it as i play and have been learning so much while doing so. and i have just caught myself jetragon using the cheesy campfire method and also got the saddle, now i am just trying to figure out who to take out of my team to bring him onto the team, i also want to take on the other legendaries but i fear i am not only inexperienced but definitely unprepared for them